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What are homologous structures?giving an example , Do they posses comman ancestors?
Ans::homologues structures are the organs of different organisms having same origin ,structure but different functions
Eg-forelimbs of a dog and forelimb of a human
The origin is same so there are the chances of having ancestor
But the variation and errors in DNA copying over a very long period of time may result in different appearances
So they don't have comman ancestor
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